Articles Tagged with ''refrigeration''

Refrigeration Tech Talks Refrigerants

By John R. Hall
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A day in the life of a refrigeration service tech provides a lot of different tasks — tasks that include working with a variety of refrigerants.


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85 Years of Leadership: Industry Milestones

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Significant events in HVACR history.


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Sept. 9, 2011: AHRI Seeks Refrigerant Research Participants

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The Air-Conditioning, Heating, and Refrigeration Institute (AHRI) is seeking the participation of domestic and foreign manufacturers and research laboratories for an AHRI-led, industry-wide cooperative research program.


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Frost and Defrost: How It Happens and Why It Is Needed - A White Paper

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Empirical testing has shown that the optimum time to defrost is when the evaporator loses about 10 percent efficiency. Traditional methods of defrost, based on time, cannot ascertain this loss of efficiency and will either waste time and energy in excessive defrosting, or never fully defrost the evaporator.


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Secondary Systems in Supermarkets

By Bill Katz
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As new stores are built and older systems in existing stores replaced, an approach called secondary refrigeration is gaining wider acceptance and is steadily increasing in numbers.


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Dealing With Starts, Avoiding Failures

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Service technicians know that keeping compressors operating properly can present challenges, especially in supermarket refrigeration applications.


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Advancements in Software Help Visualize Alarms

By Dave Yoder
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As today’s supermarkets continue to evolve, advances in software technology are helping to simplify critical refrigeration management issues.


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Distributed Refrigeration Technologies

By Travis D. Lumpkin, P.E.
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Centralized refrigeration systems have been in use for years. Distributed systems, on the other hand, are one of the newer commercially adopted refrigeration technologies.


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Ice Breaker: Fan Cycling Controls

By Joe Marchese
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Many refrigeration systems are installed using an outdoor air-cooled condenser. When these systems are installed in a climate where the outdoor temperature drops below 60°F, some means of preventing the condensing pressure from dropping too low must be incorporated into its design.
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The Professor: Chemical-Free Cooling Tower Treatment

By John Tomczyk
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When evaporation occurs in a cooling tower, only the water evaporates; it exits the cooling tower as water vapor, but leaves the minerals behind to concentrate in the cooling tower’s water system.
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Mark Satterfield, founder and CEO of Gentle Rain Marketing Inc. and author of “The One Week Marketing Plan” talks about his book and the importance of HVAC blogging. Posted on Sept. 19.

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